Description:
Current physics research. (Moderated)
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Covariant Quantization Commutations
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In some earlier post by Jay Yablon, he said that the commutation relations were [x_m, p_m]=g_{mn}. My question is: Is this commutators really defined for the x and p of any coordinate system in Minkowski space including jumbled up curvilinear coordinate systems.
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CO2 concentration
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Is there any method to determine concentration of Carbon dioxide dissolved in water by using UV-VIS Spectrophotometer?
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Turbulence
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Hello.. I have one question regarding Turbulence. The basic idea behind modeling turbulent flows is to find the energy spectrum for different length scales which are present in the system. And most of the turbulent flows have these "eddies" or "vortices" in them. Why are "eddies" or circular patterns or vortices so common in... more »
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48 Majorana fermions in type II?
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I am surprised and ashamed I did not notice that the compactification of type II strings into four dimensions produces exactly 8 Majorana gravitini *and 48 spin 1/2 majorana fermions*. Well, last time I counted, the standard model had 48 Weyl fermions. There is not any clever trick to pass one to another?... more »
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higher order moment decomposition for exponential distributions
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Dear all, I hope this is the right group to ask for help---else feel free to point me right, as I do not wish to upset anyone by cross-posting. I am looking for a way to decompose 4-th order moments into (I hope) sums of 2-nd order moments, for exponential (Rayleigh or Rice) distributed variables. I already know how to do this for Gaussian... more »
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Math behind mixing two colors
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Hi, I am stuck at the math one needs to do to mix colors. Here is the exact problem statement: I am provided the intensities (a.u.) of all the wavelengths in the visible range (400 to 670 nm). I know the RGB values (between 0-1) at all the wavelengths. I need to mix all the wavelengths and find out the color I would get. For example: If the intensity at 650nm is 1 and... more »
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Point At Center Of The Earth Which Is Neutral In Gravity?
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Like there is a neutral point of gravity some distance between the Earth and the Moon where both gravitational fields cancel each other out, would there be a point at the center of the Earth where Earth's surrounding gravitational field becomes neutral and cancel itself out. If we could take the rough diameter of the Earth and given that... more »
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Crook's tube experiment cont'd
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As promised, aiming the laser at the vane edge on the white side has no effect in 3 minutes. As noted by someone else, I forgot to state the direction of rotation. It was along the unit normal of the white surface (wouldn't that be something if it wasn't) :-) bob
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Dark energy field amplification?
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If dark energy did work the same as one of the fields that we know can be amplified how would you go about it? What materials or imaginary materials would you need? What basic knowledge would you need to know about dark energy to amplify it that we don't know yet?
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